spoor



A. D. sPooR, or Tiroir, Nnw roux.

AGITATING Gears-BAR;

"speeiseefion ef Letters Patent Ne.` 8,043, dated Aprii 15, 185i.

To all Lo/wm @ffmc/,y concern Be it known that I, ABRAHAM D. SPooR, of Troy, in the county of Rensselaer and State of New York, have invented new and useful improvements in Grates for Burning Coal and other Fuel, applicable to open or closed fireplacesfof diiferent descriptions, which improvements, `in combination, l denominate the Economical grate; and I do hereby declare that the following is a full,`clear, and exact description of the con`- struction and operation of the same, ref; erence being had to the accompanying drawings, forming part of this specification, `in

whichv Figure l' is apartial front orend elevation, the remaining portion being similar to the half or part shown. Fig. 2 is a side, or longitudinal elevation. Fig. 3 is a plan withhalf the top or stationary grate removed, in order to exhibit the working or lower parts. Fig. 4 isa transverse sectional elevation, representing the grate in a state of rest. Fig. 5 is a longitudinal vertical section, the parts positioned as in Fig.'

4;. Fig. 6 is a transverse vertical section, showing the operation of the movable grate in a perpendicular direction. Fig. 7 is a partial longitudinal elevation representing the manner in which the perpendicular inon tion `of the lower grate is produced. F igzi 8 is a longitudinal verticalsection, in which, the movable grate is shown subjected to a rocking motion.

The nature of my invention refers to the use ofV two separate grates, one of them being made stationary and the otherinade movable and consists in the application to the movable grate of two separate mechanical movements, viz, a rocking or verticalvibratory motion as desired.

Similar letters of reference in the several figures refer to like parts.

To enable others skilled in the art to make and use my invention, I will proceed to describeits construction and operation.`

A, A, is the outside frame for holding the grate and may be made of any suitable shape.

B, B, is the upper or stationary grate, the bars of which ci a are concave on their sur` facie for retaining ashes `to diminish the destructive effectof heat upon them, or they may be made of the ordinary or any other orm.

The grate B, B, of which a, a, are the ,DE D2, are shafts, xthesides of the frame A, A. D1, maybe `worked `by a lever fittingon the part 2),. `Fig. 3, or `by an arm d1, worked backward and forward by a handle or rod e.

bars, `is firmly secured to or cast with the frame Ali, the bars a, a, being made wide at the top and narrowedat the bottom.

C, C, are bars with strips o, c, forming the movable or lower grate, which rests loose so as to operate when required. The bars '(3, C, are the reverse of the bars in the stationary grate being wider at their bottom and narrow at their top. Also morevertical at their sides than a, a, and deeper. having their `bearings in E, is a connecting rod attaching (Z1, toa similar arm (Z2, fixed to, or welded with, the shaft D2, the motion of these shafts is vibratory. f, f, are toes or lifters fixed to the shafts D1, D2, lthere, being four of them, two on either shaft, and when the shaftsDl, D2, are made to vibrate, the toes f, f, work the grate C, C, c, @,in a perpendicular or vertical directio i F, is a middle rocking shaft similar to D1, D2, and vibrating by means of the han-` dle G, which through toes g2, g2, two on either side of the shaft F, rocks the movable grate.`

The several toes or lifters act against the under surface of the bars C, C. h., i, are guides or checks for obviating a lateral movement in the grate C, fitted to the shafts D1, D2.

The operation is as follows: The lower grate C, C, c, c, when ina state of rest, has

its bars on a level at theirtop with the `stationary bars a, a, as seen more particularly in Figs. l and 5. By moving the rod or handle e, horizontally inward motion is com-` municated to the arm dfby rod E, to cl2.

Shafts D1, D2, and toes or lifters f, 7', which when at their top stroke occupy the position shown in FigsfG and 7, moving the lower grate C, C, c, c, vertically upward and the mass of fuel resting on the several bars along with it. The saine motion may be produced by working the shafts D1 by a handle similar tofG, fitted on the end b, of the shafts D1, or the motion maybe communicated by steam or other power by connecting the rode to suitable reciprocating machinery which might be put in motion occasionally, thus causing the furnace to Iclear itself of ashes and burned matter and would prove itself of advantage in l0co1no- C, c, c, they are tive, marine or stationary boiler furnaces as well as in stoves and replaces generally. The rocking motion of the grate is produced as described, by the toes g, g, which being placed in opposite sides of the shaft F, lift the lower or movable grate to a sloping position, alternately reversing the slope as the handle Gr, is worked backward and forward and the shaft F, is made to vibrate, as shown in Fig. 8, by parts in full and lines in red, thus throwing the fuel, first from one side and then to the other and so breaking and shaking the mass of burning fuel as to clear the fire in the manner of Va poker and screen combined.

The rocking motion, as described, is difl ferent from any previous similar action where a rocking motion has been used, inasmuch as the grate does not rock or vibrate from its center, but has its center of motion at either end alternately, the opposite ends of the bars C, C, describing the segment of a. circle, thus clearing the center of the fire as eifectually as the sides or ends, the movable grate C, C, c, c, is shown to rest on the toes f, 7, g, g, and shafts D1, D2 F; and in the rocking motion just described its point of action or center of motion is alternately on D1, and shaft D2, when the grate C, C, c, c, is required to act as a damper or extinguisher, the bars C, C, may be made thick enough or with projections at their bottom in the manner of4 a flange so as to close, or partly shut up, the spaces between the bars when the lower grate C, C, c, c, is raised to its vertical position shown in Fig. 6, thus checking or shutting out the admission of air. The bars C, C, being made more vertical on their sides than the bars a, a, in the stationary grate,

jostled as to separate the ash as required,

and in both movements the bars of the lower grate penetrate the under surface of the mass of coal, as so many pokers with this advantage, that whether in motion or at rest,

they remain within the spaces of the upper grate, retaining the fine coal that otherwise would drop through, thus fitting it for burning coal of the smallest as well as the largest size and adapting it to its manifold oiiice of grate poker and screen.

I do not claim the employment of a movable grate formed by bars C, C, and strips c, c, the bars C C working within the bars of the stationary grate, but

That I do claim as my invention and desire to secure by Letters Patent, is-

- The application to the movable grate o-f two separate mechanical movements whereby it may receive a rocking or a vertical vibratory motion at pleasure, the several parts constructed and operating substanf tially in the manner shown and described.

A. D. SPOOR.

Vitnesses:

JOSEPH VVILsoN, Gr. ROBERTSON, J r. 

